And the third suspect was described as having sallow skin and short dark hair, which was shaved at the sides. He was wearing a white t-shirt with an image on the front and black jogging bottoms with a white stripe.

He said: “What we know is that a group of six to seven male youths were in Buchanan St, between West George Street and Bath St, when three of the group became involved in an altercation with at least one other man in the street.

"A number of his friends came to his aid and it is then that the fight took place.

“From CCTV and our enquiries, we understand that one man sustained an eye injury during the incident but he left before police arrived. It is essential that we trace him both to find out if he is ok and also what information he has about the assault.

“At the moment, the motive for the attack is not known, however, it is possible that whilst this was not a planned meet, the two groups knew each other.

Police at the scene (Photo: Jamie Williamson 2016)

“The response from the public has been positive so far, however, we would still like to hear from anyone who witnessed the incident or who has information that will assist with our enquiries.

“We know from social media and from speaking to witnesses that some of it was captured on mobile phones. If you have any footage at all, please let the police know. Police are also checking CCTV in the area to identify the third injured man and the suspects.

“Any information can be passed to officers at Stewart St Police Office via 101 or alternatively, to Crimestoppers on 0800 555 111 where details can be passed in confidence.”